roar/libtools/MiRCARTToolLine.py

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#!/usr/bin/env python3
#
# MiRCARTToolLine.py -- XXX
# Copyright (c) 2018 Lucio Andrés Illanes Albornoz <lucio@lucioillanes.de>
#
from MiRCARTTool import MiRCARTTool
class MiRCARTToolLine(MiRCARTTool):
"""XXX"""
name = "Line"
toolColours = toolOriginPoint = toolState = None
TS_NONE = 0
TS_ORIGIN = 1
# {{{ _pointDelta(self, a, b): XXX
def _pointDelta(self, a, b):
return [a2-a1 for a1, a2 in zip(a, b)]
# }}}
# {{{ _pointSwap(self, a, b): XXX
def _pointSwap(self, a, b):
return [b, a]
# }}}
# {{{ _getLine(self, brushColours, brushSize, eventDc, isCursor, originPoint, targetPoint, dispatchFn): XXX
def _getLine(self, brushColours, brushSize, eventDc, isCursor, originPoint, targetPoint, dispatchFn):
originPoint = originPoint.copy(); targetPoint = targetPoint.copy();
pointDelta = self._pointDelta(originPoint, targetPoint)
lineXSign = 1 if pointDelta[0] > 0 else -1;
lineYSign = 1 if pointDelta[1] > 0 else -1;
pointDelta = [abs(a) for a in pointDelta]
if pointDelta[0] > pointDelta[1]:
lineXX, lineXY, lineYX, lineYY = lineXSign, 0, 0, lineYSign
else:
pointDelta = [pointDelta[1], pointDelta[0]]
lineXX, lineXY, lineYX, lineYY = 0, lineYSign, lineXSign, 0
lineD = 2 * pointDelta[1] - pointDelta[0]; lineY = 0;
for lineX in range(pointDelta[0] + 1):
for brushStep in range(brushSize[0]):
patch = [ \
originPoint[0] + lineX*lineXX + lineY*lineYX + brushStep, \
originPoint[1] + lineX*lineXY + lineY*lineYY, \
*brushColours, 0, " "]
if isCursor:
dispatchFn(eventDc, False, patch); dispatchFn(eventDc, True, patch);
else:
dispatchFn(eventDc, True, patch)
if lineD > 0:
lineD -= pointDelta[0]; lineY += 1;
lineD += pointDelta[1]
# }}}
#
# onMouseEvent(self, event, atPoint, brushColours, brushSize, isDragging, isLeftDown, isRightDown, dispatchFn, eventDc): XXX
def onMouseEvent(self, event, atPoint, brushColours, brushSize, isDragging, isLeftDown, isRightDown, dispatchFn, eventDc):
brushColours = brushColours.copy()
if isLeftDown:
brushColours[1] = brushColours[0]
elif isRightDown:
brushColours[0] = brushColours[1]
else:
brushColours[1] = brushColours[0]
if self.toolState == self.TS_NONE:
if isLeftDown or isRightDown:
self.toolColours = brushColours
self.toolOriginPoint = list(atPoint)
self.toolState = self.TS_ORIGIN
dispatchFn(eventDc, True, [*atPoint, *brushColours, 0, " "])
elif self.toolState == self.TS_ORIGIN:
targetPoint = list(atPoint)
originPoint = self.toolOriginPoint
self._getLine(self.toolColours, brushSize, \
eventDc, isLeftDown or isRightDown, \
originPoint, targetPoint, dispatchFn)
if isLeftDown or isRightDown:
self.toolColours = None
self.toolOriginPoint = None
self.toolState = self.TS_NONE
# __init__(self, *args): initialisation method
def __init__(self, *args):
super().__init__(*args)
self.toolColours = None
self.toolOriginPoint = None
self.toolState = self.TS_NONE
# vim:expandtab foldmethod=marker sw=4 ts=4 tw=120